Adobe hasn't updated Livemotion for a couple of years. It's definitely getting stale.
Adobe updated After Effects earlier this year with a horde of JavaScript based functionality and lots of other neato ish. Technically- all it needs to do is hone a few points and they could launch a wholesale flash/svg/web animation and interactivity solution. Livemotion's interface was remarkably similar to After Effects, which is a fabulous animation tool, to begin with. Tons of people already respect and love After Effects (myself included). Why try and inject a new product into the market when they already have one that's practically industry-standard (not to mention one that integrates seamlessly with illustrator, photoshop, etc. etc. etc.
But yeah- livemotion's scripting is definitely not finished (usable?). Flash's animation tools are wretched. Someone needs to take the initiative.